{"id":100025,"date":"2026-02-15T20:07:01","date_gmt":"2026-02-15T20:07:01","guid":{"rendered":"https:\/\/vibromera.eu\/?post_type=calculator&#038;p=100025"},"modified":"2026-02-15T20:07:01","modified_gmt":"2026-02-15T20:07:01","slug":"bearing-press-fit-force","status":"publish","type":"calculator","link":"https:\/\/vibromera.eu\/nb\/calculators\/bearing-press-fit-force\/","title":{"rendered":"Kalkulator for press-fit kraft for lager | Lam\u00e9-ligninger | Gratis online verkt\u00f8y"},"content":{"rendered":"\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"WebApplication\",\"name\":\"Bearing Press-Fit Force Calculator\",\"description\":\"Estimate bearing press-in force for cold mounting using Lam\u00e9 equations.\",\"url\":\"https:\/\/vibromera.eu\/calculators\/bearing-press-fit-force\/\",\"applicationCategory\":\"Engineering Calculator\",\"operatingSystem\":\"Any\",\"offers\":{\"@type\":\"Offer\",\"price\":\"0\",\"priceCurrency\":\"EUR\"},\"creator\":{\"@type\":\"Organization\",\"name\":\"Vibromera\",\"url\":\"https:\/\/vibromera.eu\/\"},\"datePublished\":\"2025-01-01\",\"dateModified\":\"2026-02-15\",\"inLanguage\":\"en\",\"isAccessibleForFree\":true}<\/script>\n\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"How is press-fit force calculated?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Press-fit force F = p \u00d7 \u03c0 \u00d7 d \u00d7 L \u00d7 \u03bc, where p is the interface pressure from Lam\u00e9's thick-cylinder equations, d is the bore, L is the contact length, and \u03bc is the assembly friction coefficient (typically 0.08-0.15 with oil).\"}},\n{\"@type\":\"Question\",\"name\":\"What friction coefficient should I use for assembly?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"For assembly (pressing in), use \u03bc \u2248 0.08-0.12 with oil lubrication on the shaft. Dry assembly uses \u03bc \u2248 0.15-0.20. Always lubricate the shaft before pressing to reduce force and prevent scoring.\"}},\n{\"@type\":\"Question\",\"name\":\"When should I use hot mounting instead of cold pressing?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Hot mounting (heating the bearing to 80-110\u00b0C) is recommended when: the interference is large (>0.001\u00d7d), the bearing bore exceeds 80mm, or the press-fit force exceeds the capacity of your press. Never heat above 120\u00b0C.\"}},\n{\"@type\":\"Question\",\"name\":\"What press capacity do I need?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The press must provide at least 1.5\u00d7 the calculated press-fit force to account for variations. For a typical 50mm bearing with normal interference, 5-20 kN (0.5-2 tonnes) is common. Larger bearings may require 50-100+ kN.\"}},\n{\"@type\":\"Question\",\"name\":\"Can pressing damage the bearing?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, if force is applied through the wrong ring. When pressing onto a shaft, apply force ONLY to the inner ring. When pressing into a housing, apply force ONLY to the outer ring. Never transmit force through rolling elements.\"}}\n]}<\/script>\n\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vibromera.eu\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Calculators\",\"item\":\"https:\/\/vibromera.eu\/calculators\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Bearing Press-Fit Force\",\"item\":\"https:\/\/vibromera.eu\/calculators\/bearing-press-fit-force\/\"}]}<\/script>\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\n\n<link href=\"https:\/\/fonts.googleapis.com\/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&#038;family=JetBrains+Mono:wght@400;500;600&#038;family=Fraunces:opsz,wght@9..144,700;9..144,800&#038;display=swap\" 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.15s}.vc-faq-q:hover{background:#ede9e3}.vc-faq-chevron{width:16px;height:16px;color:var(--vc-ink-muted);flex-shrink:0;transition:transform .25s}.vc-faq-item.vc-open .vc-faq-chevron{transform:rotate(180deg)}.vc-faq-a{max-height:0;overflow:hidden;transition:max-height .35s}.vc-faq-item.vc-open .vc-faq-a{max-height:1200px}.vc-faq-a-inner{padding:14px 16px;border-top:1px solid var(--vc-border-light);font-size:14px;color:var(--vc-ink-secondary)}.vc-faq-a-inner p{margin:0 0 8px}.vc-faq-a-inner p:last-child{margin-bottom:0}.vc-related{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.vc-related-link{display:inline-block;padding:8px 16px;font-family:var(--vc-font);font-size:13px;font-weight:600;background:var(--vc-surface-alt);color:var(--vc-ink-secondary);border:1px solid var(--vc-border);border-radius:var(--vc-radius);text-decoration:none;transition:all .15s}.vc-related-link:hover{border-color:var(--vc-accent);color:var(--vc-accent);background:var(--vc-accent-light)}.vc-promo{margin-top:24px;padding:20px;background:linear-gradient(135deg,var(--vc-accent-light),var(--vc-surface));border:1px solid var(--vc-border);border-radius:var(--vc-radius-lg);display:flex;align-items:center;gap:16px}.vc-promo-text{flex:1;font-size:14px;color:var(--vc-ink-secondary)}.vc-promo-text strong{color:var(--vc-ink)}.vc-promo-link{padding:8px 20px;font-size:13px;font-weight:700;color:#fff;background:var(--vc-accent);border-radius:var(--vc-radius);text-decoration:none;white-space:nowrap;transition:background .15s}.vc-promo-link:hover{background:var(--vc-accent-hover)}.vc-footer{text-align:center;padding:32px 16px;font-size:13px;color:var(--vc-ink-muted)}.vc-footer a{color:var(--vc-accent);text-decoration:none}.vc-footer a:hover{text-decoration:underline}.vc-footer-links{margin-top:8px;font-size:12px}.vc-footer-links a{margin:0 8px}@media print{.vc-section-body{max-height:none!important}.vc-faq-a{max-height:none!important}.vc-results{max-height:none!important;padding:24px!important}.vc-copy-btn,.vc-section-chevron,.vc-faq-chevron,.vc-presets,.vc-promo{display:none!important}}<\/style>\n\n<div class=\"vc-calculator\">\n<header class=\"vc-header\"><p class=\"vc-header-eyebrow\">Free Engineering Tool #058<\/p><h1 class=\"vc-header-title\">Bearing Press-Fit Force Calculator<\/h1><p class=\"vc-header-subtitle\">Estimate the axial force required to cold press-fit a bearing onto a shaft. Uses Lam\u00e9&#8217;s thick-cylinder equations with assembly friction coefficient.<\/p><div class=\"vc-badges\"><span class=\"vc-badge\">Lam\u00e9 Equations<\/span><span class=\"vc-badge\">Assembly Force<\/span><span class=\"vc-badge\">Cold Press<\/span><\/div><\/header>\n<div class=\"vc-card\">\n    <form class=\"vc-form\" id=\"vc-form\" autocomplete=\"off\">\n        <div class=\"vc-form-grid\">\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-d\">Nominal Bore d <span class=\"vc-label-hint\">(mm)<\/span><\/label><input class=\"vc-input\" type=\"number\" id=\"vc-d\" inputmode=\"decimal\" step=\"any\" min=\"5\" value=\"50\"><\/div>\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-delta\">Diametral Interference \u03b4 <span class=\"vc-label-hint\">(mm, e.g. 0.018)<\/span><\/label><input class=\"vc-input\" type=\"number\" id=\"vc-delta\" inputmode=\"decimal\" step=\"any\" min=\"0.001\" value=\"0.018\"><\/div>\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-L\">Contact Length <span class=\"vc-label-hint\">(mm, bearing width)<\/span><\/label><input class=\"vc-input\" type=\"number\" id=\"vc-L\" inputmode=\"decimal\" step=\"any\" min=\"1\" value=\"18\"><\/div>\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-Do\">Outer Diameter of Ring <span class=\"vc-label-hint\">(mm, bearing OD)<\/span><\/label><input class=\"vc-input\" type=\"number\" id=\"vc-Do\" inputmode=\"decimal\" step=\"any\" min=\"10\" value=\"80\"><\/div>\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-mu\">Assembly Friction \u03bc <span class=\"vc-label-hint\">(oiled \u2248 0.10, dry \u2248 0.18)<\/span><\/label><input class=\"vc-input\" type=\"number\" id=\"vc-mu\" inputmode=\"decimal\" step=\"any\" min=\"0.01\" max=\"1\" value=\"0.10\"><\/div>\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-E\">Young&#8217;s Modulus E <span class=\"vc-label-hint\">(GPa, steel \u2248 210)<\/span><\/label><input class=\"vc-input\" type=\"number\" id=\"vc-E\" inputmode=\"decimal\" step=\"any\" min=\"1\" value=\"210\"><\/div>\n        <\/div>\n        <div class=\"vc-presets\"><div class=\"vc-presets-label\">Quick presets<\/div>\n            <button type=\"button\" class=\"vc-preset-btn\" data-d=\"50\" data-delta=\"0.018\" data-l=\"18\" data-do=\"80\" data-mu=\"0.10\" data-e=\"210\">6210 \/ \u03b4=18\u03bcm \/ oiled<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-d=\"80\" data-delta=\"0.025\" data-l=\"23\" data-do=\"140\" data-mu=\"0.10\" data-e=\"210\">6216 \/ \u03b4=25\u03bcm \/ oiled<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-d=\"30\" data-delta=\"0.013\" data-l=\"14\" data-do=\"62\" data-mu=\"0.10\" data-e=\"210\">6206 \/ \u03b4=13\u03bcm \/ oiled<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-d=\"100\" data-delta=\"0.035\" data-l=\"33\" data-do=\"180\" data-mu=\"0.10\" data-e=\"210\">6220 \/ \u03b4=35\u03bcm \/ oiled<\/button>\n        <\/div>\n    <\/form>\n    <div class=\"vc-results\" id=\"vc-results\">\n        <div class=\"vc-results-head\"><h2 class=\"vc-results-title\">Results<\/h2><button type=\"button\" class=\"vc-copy-btn\" id=\"vc-copy-btn\"><svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><rect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\"\/><path d=\"M5 15H4a2 2 0 01-2-2V4a2 2 0 012-2h9a2 2 0 012 2v1\"\/><\/svg> Copy<\/button><\/div>\n        <div class=\"vc-result-grid\">\n            <div class=\"vc-rcard vc-rcard-primary\"><div class=\"vc-rcard-label\">Press-Fit Force<\/div><div class=\"vc-rcard-value\" id=\"vc-r-F\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Interface Pressure p<\/div><div class=\"vc-rcard-value\" id=\"vc-r-p\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Force in tonnes<\/div><div class=\"vc-rcard-value\" id=\"vc-r-tons\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Recommended Press Capacity<\/div><div class=\"vc-rcard-value\" id=\"vc-r-press\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Hot Mounting Temperature<\/div><div class=\"vc-rcard-value\" id=\"vc-r-hot\">\u2014<\/div><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n<div class=\"vc-section vc-open\" id=\"vc-sec-theory\"><button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"true\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\ud83d\udcd8<\/span><span class=\"vc-section-title\">Theory &amp; Formulas<\/span><\/span><svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button>\n    <div class=\"vc-section-body\"><div class=\"vc-section-inner vc-theory\">\n        <h3>Interface Pressure (Lam\u00e9)<\/h3><div class=\"vc-formula-box\" id=\"vc-katex-1\"><\/div>\n        <h3>Press-Fit Force<\/h3><div class=\"vc-formula-box\" id=\"vc-katex-2\"><\/div>\n        <ul><li><strong>\u03bc<\/strong> \u2014 assembly friction: 0.08\u20130.12 with oil, 0.15\u20130.20 dry<\/li><li><strong>\u03b4<\/strong> \u2014 diametral interference (shaft OD \u2212 bearing bore)<\/li><li><strong>d<\/strong> \u2014 nominal bore diameter<\/li><li><strong>D<sub>o<\/sub><\/strong> \u2014 bearing outer diameter<\/li><\/ul>\n        <h3>Hot Mounting Alternative<\/h3>\n        <div class=\"vc-info-box\"><p><strong>\u2139\ufe0f<\/strong> Heating the bearing to 80\u2013110\u00b0C expands the inner ring enough to slide onto the shaft without force. Required \u0394T \u2248 \u03b4 \/ (d \u00d7 \u03b1) + 10\u00b0C margin. Never exceed 120\u00b0C to avoid metallurgical changes.<\/p><\/div>\n        <h3>Practical Example<\/h3>\n        <div class=\"vc-example-box\"><div class=\"vc-example-title\">Example \u2014 6210 (50\u00d780\u00d718), \u03b4 = 0.018 mm<\/div>\n            <p>k = 50\/80 = 0.625<\/p>\n            <p>p = 210000 \u00d7 0.018 \/ (2 \u00d7 50) \u00d7 (1 \u2212 0.625\u00b2) = 23.3 MPa<\/p>\n            <p>F = 23.3 \u00d7 \u03c0 \u00d7 50 \u00d7 18 \u00d7 0.10 \/ 1000 = <strong>6.6 kN (0.67 tonnes)<\/strong><\/p>\n        <\/div>\n        <div class=\"vc-warning-box\"><p style=\"margin:0;font-size:14px;color:var(--vc-ink-secondary);\"><strong>\u26a0\ufe0f Critical:<\/strong> When pressing a bearing onto a shaft, apply force ONLY to the inner ring. Never transmit force through rolling elements \u2014 this will cause brinelling damage.<\/p><\/div>\n    <\/div><\/div>\n<\/div>\n<div class=\"vc-section\" id=\"vc-sec-related\"><button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"false\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\ud83d\udd17<\/span><span class=\"vc-section-title\">Related Calculators<\/span><\/span><svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button>\n    <div class=\"vc-section-body\"><div class=\"vc-section-inner\"><div class=\"vc-related\"><a class=\"vc-related-link\" href=\"\/calculators\/bearing-removal-force\/\">Bearing Removal Force<\/a><a class=\"vc-related-link\" href=\"\/calculators\/bearing-fit-tolerance\/\">Fit Tolerance Selection<\/a><a class=\"vc-related-link\" href=\"\/calculators\/bearing-tolerance-class\/\">Tolerance Class (ISO 492)<\/a><a class=\"vc-related-link\" href=\"\/calculators\/bearing-thermal-expansion\/\">Thermal Expansion<\/a><\/div><\/div><\/div>\n<\/div>\n<div class=\"vc-section\" id=\"vc-sec-faq\"><button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"false\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\u2753<\/span><span class=\"vc-section-title\">Frequently Asked Questions<\/span><\/span><svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button>\n    <div class=\"vc-section-body\"><div class=\"vc-section-inner\"><div class=\"vc-faq-list\" id=\"vc-faq-list\"><\/div><\/div><\/div>\n<\/div>\n<div class=\"vc-promo\"><div class=\"vc-promo-text\"><strong>Vibromera \u2014 Portable Balancing &amp; Vibration Analysis<\/strong><br>Professional vibration analyzers for bearing condition monitoring. Used in 50+ countries.<\/div><a class=\"vc-promo-link\" href=\"https:\/\/vibromera.eu\/\" target=\"_blank\" rel=\"noopener\">Learn More<\/a><\/div>\n<footer class=\"vc-footer\"><p>\u00a9 2024\u20132026 <a href=\"https:\/\/vibromera.eu\/\">Vibromera<\/a><\/p><p style=\"font-size:12px;margin-top:4px;\">Calculator #058. Last updated: February 2026<\/p><div class=\"vc-footer-links\"><a href=\"\/calculators\/engineering-calculators\/\">All Calculators<\/a><a href=\"https:\/\/vibromera.eu\/contacts\/\">Contact<\/a><\/div><\/footer>\n<\/div>\n<script src=\"https:\/\/cdn.jsdelivr.net\/npm\/katex@0.16.11\/dist\/katex.min.js\"><\/script>\n<script>\n(function(){\n    'use strict';var SLUG='bearing-press-fit-force';\n    function $(id){return document.getElementById(id)}\n    function fmt(n,d){if(isNaN(n)||!isFinite(n))return'\u2014';return n.toFixed(d===undefined?1:d).replace(\/(\\.\\d*?)0+$\/,'$1').replace(\/\\.$\/,'')}\n\n    function calculate(){\n        var d=parseFloat($('vc-d').value),delta=parseFloat($('vc-delta').value),L=parseFloat($('vc-L').value);\n        var Do=parseFloat($('vc-Do').value),mu=parseFloat($('vc-mu').value),E_GPa=parseFloat($('vc-E').value);\n        if(!d||d<=0||!delta||delta<=0||!L||L<=0||!Do||Do<=d||!mu||!E_GPa){$('vc-results').classList.remove('vc-visible');return;}\n        var E=E_GPa*1000;\n        var k=d\/Do;\n        var p=E*delta\/(2*d)*(1-k*k);\n        var F=p*Math.PI*d*L*mu\/1000; \/\/ kN\n        var tons=F\/9.807;\n        var pressCapacity=F*1.5;\n        \/* Hot mounting temp: \u0394T = \u03b4\/(d\u00d7\u03b1) + 10\u00b0C margin, \u03b1 for steel \u2248 11.7e-6 *\/\n        var alpha=11.7e-6;\n        var hotDT=delta\/(d*alpha)+10;\n\n        $('vc-r-F').innerHTML=fmt(F,F<1?2:1)+' <span class=\"vc-rcard-unit\">kN<\/span>';\n        $('vc-r-p').innerHTML=fmt(p,1)+' <span class=\"vc-rcard-unit\">MPa<\/span>';\n        $('vc-r-tons').innerHTML=fmt(tons,2)+' <span class=\"vc-rcard-unit\">tonnes<\/span>';\n        $('vc-r-press').innerHTML='\u2265 '+fmt(pressCapacity,1)+' <span class=\"vc-rcard-unit\">kN (1.5\u00d7 safety)<\/span>';\n        $('vc-r-hot').innerHTML=fmt(hotDT,0)+' <span class=\"vc-rcard-unit\">\u00b0C above ambient<\/span>';\n        $('vc-results').classList.add('vc-visible');\n        var u=new URL(window.location);u.searchParams.set('d',d);u.searchParams.set('delta',delta);u.searchParams.set('L',L);u.searchParams.set('Do',Do);history.replaceState(null,'',u.toString());\n        saveHistory({d:d,delta:delta,L:L,Do:Do,mu:mu,_summary:'d='+d+' \u03b4='+delta+'mm \u2192 F='+fmt(F,1)+'kN'});\n    }\n\n    document.querySelectorAll('.vc-preset-btn').forEach(function(btn){btn.addEventListener('click',function(e){e.preventDefault();$('vc-d').value=this.getAttribute('data-d');$('vc-delta').value=this.getAttribute('data-delta');$('vc-L').value=this.getAttribute('data-l');$('vc-Do').value=this.getAttribute('data-do');$('vc-mu').value=this.getAttribute('data-mu');$('vc-E').value=this.getAttribute('data-e');calculate();});});\n    $('vc-form').addEventListener('input',calculate);$('vc-form').addEventListener('change',calculate);\n    $('vc-copy-btn').addEventListener('click',function(){var text='Bearing Press-Fit Force\\n\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\\nd='+$('vc-d').value+'mm, \u03b4='+$('vc-delta').value+'mm\\nL='+$('vc-L').value+'mm, Do='+$('vc-Do').value+'mm, \u03bc='+$('vc-mu').value+'\\nF = '+$('vc-r-F').textContent+'\\np = '+$('vc-r-p').textContent+'\\nHot mount: '+$('vc-r-hot').textContent+'\\n\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\\nvibromera.eu';if(navigator.clipboard){navigator.clipboard.writeText(text).then(function(){var b=$('vc-copy-btn');b.classList.add('vc-copied');b.innerHTML='<svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><polyline points=\"20 6 9 17 4 12\"\/><\/svg> Copied!';setTimeout(function(){b.classList.remove('vc-copied');b.innerHTML='<svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><rect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\"\/><path d=\"M5 15H4a2 2 0 01-2-2V4a2 2 0 012-2h9a2 2 0 012 2v1\"\/><\/svg> Copy';},2000);});}});\n    document.querySelectorAll('.vc-section-toggle').forEach(function(btn){btn.addEventListener('click',function(){var s=this.closest('.vc-section');s.classList.toggle('vc-open');this.setAttribute('aria-expanded',s.classList.contains('vc-open'));});});\n    var faqData=[{q:'How is press-fit force calculated?',a:'<p>F = p \u00d7 \u03c0 \u00d7 d \u00d7 L \u00d7 \u03bc, where p is interface pressure from Lam\u00e9\\'s equations, d is bore, L is contact length, \u03bc is assembly friction coefficient (0.08\u20130.12 with oil).<\/p>'},{q:'What friction coefficient for assembly?',a:'<p>With oil: \u03bc \u2248 0.08\u20130.12. Dry: \u03bc \u2248 0.15\u20130.20. Always lubricate the shaft before pressing to reduce force and prevent scoring.<\/p>'},{q:'When should I use hot mounting?',a:'<p>When interference is large (>0.001\u00d7d), bore exceeds 80mm, or press force exceeds press capacity. Heat bearing to 80\u2013110\u00b0C. Never exceed 120\u00b0C.<\/p>'},{q:'What press capacity do I need?',a:'<p>At least 1.5\u00d7 the calculated force. For a 50mm bearing with normal interference, 5\u201320 kN is typical. Larger bearings may need 50\u2013100+ kN.<\/p>'},{q:'Can pressing damage the bearing?',a:'<p>Yes \u2014 always apply force ONLY to the ring being pressed (inner ring onto shaft, outer ring into housing). Never force through rolling elements.<\/p>'}];\n    var fl=$('vc-faq-list');faqData.forEach(function(f){fl.innerHTML+='<div class=\"vc-faq-item\"><button type=\"button\" class=\"vc-faq-q\"><span>'+f.q+'<\/span><svg class=\"vc-faq-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button><div class=\"vc-faq-a\"><div class=\"vc-faq-a-inner\">'+f.a+'<\/div><\/div><\/div>';});\n    fl.addEventListener('click',function(e){var b=e.target.closest('.vc-faq-q');if(b)b.closest('.vc-faq-item').classList.toggle('vc-open');});\n    function saveHistory(entry){var key='vc_history_'+SLUG;var arr=[];try{arr=JSON.parse(localStorage.getItem(key))||[];}catch(e){}entry._ts=new Date().toISOString();arr.unshift(entry);if(arr.length>10)arr=arr.slice(0,10);try{localStorage.setItem(key,JSON.stringify(arr));}catch(e){}}\n    function loadParams(){var p=new URLSearchParams(window.location.search);p.forEach(function(v,k){var el=$(k)||$('vc-'+k);if(el)el.value=v;});}\n    function renderFormulas(){try{\n        katex.render('p = \\\\frac{E \\\\cdot \\\\delta}{2d} \\\\cdot \\\\left(1 - \\\\frac{d^2}{D_o^2}\\\\right) \\\\quad [\\\\text{MPa}]',$('vc-katex-1'),{displayMode:true,throwOnError:false});\n        katex.render('F = p \\\\cdot \\\\pi \\\\cdot d \\\\cdot L \\\\cdot \\\\mu \\\\quad [\\\\text{N}]',$('vc-katex-2'),{displayMode:true,throwOnError:false});\n    }catch(e){}}\n    function init(){loadParams();renderFormulas();calculate();}\n    if(document.readyState==='loading'){document.addEventListener('DOMContentLoaded',init);}else{init();}\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Gratis online kalkulator for lagerpresskraft (monteringskraft) ved hjelp av Lam\u00e9-ligninger. Skriv inn boring, akseldiameter, kontaktlengde og materiale for \u00e5 estimere kraften som kreves for kaldpressmontering.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[],"tags":[],"class_list":["post-100025","calculator","type-calculator","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/calculator\/100025","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/calculator"}],"about":[{"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/types\/calculator"}],"version-history":[{"count":1,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/calculator\/100025\/revisions"}],"predecessor-version":[{"id":100336,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/calculator\/100025\/revisions\/100336"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/media?parent=100025"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/categories?post=100025"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/tags?post=100025"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}